US6244890B1 - Male electrical connector for flat flexible circuit - Google Patents

Male electrical connector for flat flexible circuit Download PDF

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Publication number
US6244890B1
US6244890B1 US09/049,831 US4983198A US6244890B1 US 6244890 B1 US6244890 B1 US 6244890B1 US 4983198 A US4983198 A US 4983198A US 6244890 B1 US6244890 B1 US 6244890B1
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US
United States
Prior art keywords
body member
connector
resilient
latch
molded
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/049,831
Inventor
Robert M. Fuerst
Yves LePottier
Russell J. Watt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Molex LLC
Original Assignee
Molex LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Molex LLC filed Critical Molex LLC
Assigned to MOLEX INCORPORATED reassignment MOLEX INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUERST, ROBERT M., LEPOTTIER, YVES, WATT, RUSSELL J.
Priority to US09/049,831 priority Critical patent/US6244890B1/en
Priority to DE69923020T priority patent/DE69923020T2/en
Priority to ES99105626T priority patent/ES2232045T3/en
Priority to EP99105626A priority patent/EP0945927B1/en
Priority to JP11079646A priority patent/JP3122969B2/en
Priority to BR9901126-3A priority patent/BR9901126A/en
Priority to KR1019990010633A priority patent/KR100310427B1/en
Priority to CNB991044304A priority patent/CN1201438C/en
Publication of US6244890B1 publication Critical patent/US6244890B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/627—Snap or like fastening
    • H01R13/6271—Latching means integral with the housing
    • H01R13/6273—Latching means integral with the housing comprising two latching arms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/78—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to other flexible printed circuits, flat or ribbon cables or like structures

Definitions

  • This invention generally relates to the art of electrical connectors and, particularly, to connectors for electrically interconnecting flat flexible circuitry.
  • a flat flexible circuit conventionally includes an elongated flat flexible dielectric substrate having laterally spaced strips of conductors on one or both sides thereof.
  • the conductors may be covered with a thin, flexible protective layer on one or both sides of the circuit. If protective layers are used, cutouts are formed therein to expose the underlying conductors at desired contact locations where the conductors are to engage the conductors of a complementary mating connecting device which may be a second flat flexible circuit, a printed circuit board or the terminals of a mating connector.
  • a wide variety of connectors have been designed over the years for terminating or interconnecting flat flexible circuits with complementary mating connecting devices.
  • Major problems continue to plague such connectors, particularly in the area of cost and reliability. Not only is the direct material costs of such connectors unduly high, but an undue amount of labor time is required in assembling such connectors.
  • the present invention is directed to solving these problems by providing an extremely simple, inexpensive and reliable connector structure not heretofore available.
  • the concepts of the present invention may be applicable for a variety of electrical connectors other than those specifically designed for a flat flexible circuit.
  • An object, therefore, of the invention is to provide a new and improved electrical connector, such as a connector for flat flexible circuitry.
  • a new and improved male connector for electrically interconnecting the conductors of a flat flexible circuit to the conductors of a complementary mating connecting device.
  • the connector includes a body member on which the flexible circuit is positioned, with the conductors of the circuit facing away from the body member.
  • At least one cantilevered latch arm projects from the body member for latching the male connector to the complementary mating connecting device.
  • a resilient web is joined between the latch arm and the body member. The resilient web performs the functions of providing an anti-overstress means and a spring means for the cantilevered latch arm as well as acting as an anti-snagging feature of the connector.
  • the body member including the latch arm, is unitarily molded of relatively rigid plastic material, and the resilient web is fabricated of an elastomeric material such as silicone rubber.
  • the resilient web may be molded substantially about the cantilevered latch arm near a distal end thereof.
  • the body member may be elongated, and including a pair of the latch arms and a corresponding pair of the resilient webs at opposite ends of the body member.
  • FIG. 1 is a perspective view of a male connector for a flat flexible circuit and incorporating the concepts of the invention
  • FIG. 2 is a perspective view of the rear of the connector
  • FIG. 3 is a top plan view of the connector
  • FIG. 4 is a vertical section taken generally along line 4 — 4 of FIG. 3;
  • FIG. 5 is a vertical section taken generally along line 5 — 5 of FIG. 3 .
  • a male connector for electrically interconnecting the conductors 12 of a flat flexible cable 14 to the conductors of a complementary mating connecting device (not shown).
  • male connector 10 can be mated with a complementary female connector by inserting a leading edge 16 of the male connector into an appropriate receptacle of the female connector.
  • the male connector could be connected to another complementary male connector.
  • flat flexible cable 14 is wrapped around leading edge 16 of the connector, and locating holes 18 in the cable are positioned over locating posts 20 on opposite sides of the male connector.
  • male connector 10 includes a male body member 22 about which flat flexible cable 14 is wrapped.
  • the male body member is generally flat and elongated and includes a pair of cantilevered latch arms 24 at opposite ends thereof.
  • the body member, including the latch arms, is unitarily molded of relatively rigid dielectric material such as plastic or the like.
  • Cantilevered latch arms 24 are joined to the body member at proximal ends 24 a of the latch arms near opposite ends of leading edge 16 of the connector. Therefore, free ends 24 b (FIG. 2) of the latch arms can flex in the direction of double-headed arrows “A” (FIGS. 1 and 3 ).
  • a pair of latch hooks 24 c project outwardly of latch arms 24 for engagement with appropriate latch means on the complementary mating connecting device.
  • the invention contemplates the provision of a resilient web 26 which is joined between each latch arm 24 and the adjacent end of body member 22 .
  • the webs are joined between distal ends 24 b of the latch arms and opposite ends of the elongated body member.
  • the resilient webs perform a dual function of providing an anti-overstress means as well as a spring means for the cantilevered latch arms. In other words, the latch arms cannot be pulled excessively away from opposite ends of the body member because of the constraints of the resilient webs. Such pulling action otherwise could overstress and actually break the latch arms.
  • the resilient webs provide auxiliary spring means for the latch arms.
  • resilient webs 26 comprise molded-in-place components which can be either insert molded on male body member 22 , or the webs and the body member can be simultaneously molded as a “two-shot” injection process. It can be seen in FIG. 4 that the resilient webs have portions 26 a molded about distal ends 24 b of the latch arms. The webs also have portions 26 b molded about integral rib portions 22 a of body member 22 . The webs, including portions 26 a and 26 b thereof, can be molded of elastomeric material, such as silicone rubber.
  • a yieldable backing structure 30 such as of silicone rubber or other elastomeric material, also can be molded-in-place simultaneously with the molding of resilient webs 26 .
  • the yieldable backing structure can be molded about a rib 22 b of body member 22 as seen in FIG. 5 .
  • the yieldable backing structure thereby, lies beneath flexible circuit 14 for resiliently biasing conductors 12 of the circuit against the conductors of the mating connecting device when male connector 10 is mated with the device.

Abstract

A connector is provided for electrically interconnecting the conductors of a flat flexible circuit to the conductors of a complementary mating connecting device. The connector includes a body member on which the flexible circuit is positioned. A latch arm projects from the body member for latching the connector to the complementary mating connecting device. A resilient web joins the latch arm to the body member for performing the functions of providing an anti-overstress structure and a spring device for the latch arm, as well as an anti-snagging feature for the connector.

Description

FIELD OF THE INVENTION
This invention generally relates to the art of electrical connectors and, particularly, to connectors for electrically interconnecting flat flexible circuitry.
BACKGROUND OF THE INVENTION
A flat flexible circuit conventionally includes an elongated flat flexible dielectric substrate having laterally spaced strips of conductors on one or both sides thereof. The conductors may be covered with a thin, flexible protective layer on one or both sides of the circuit. If protective layers are used, cutouts are formed therein to expose the underlying conductors at desired contact locations where the conductors are to engage the conductors of a complementary mating connecting device which may be a second flat flexible circuit, a printed circuit board or the terminals of a mating connector.
A wide variety of connectors have been designed over the years for terminating or interconnecting flat flexible circuits with complementary mating connecting devices. Major problems continue to plague such connectors, particularly in the area of cost and reliability. Not only is the direct material costs of such connectors unduly high, but an undue amount of labor time is required in assembling such connectors. The present invention is directed to solving these problems by providing an extremely simple, inexpensive and reliable connector structure not heretofore available. However, the concepts of the present invention may be applicable for a variety of electrical connectors other than those specifically designed for a flat flexible circuit.
SUMMARY OF THE INVENTION
An object, therefore, of the invention is to provide a new and improved electrical connector, such as a connector for flat flexible circuitry.
In the exemplary embodiment of the invention, a new and improved male connector is shown for electrically interconnecting the conductors of a flat flexible circuit to the conductors of a complementary mating connecting device. However, the concepts of the invention are not limited to male connectors. The connector includes a body member on which the flexible circuit is positioned, with the conductors of the circuit facing away from the body member. At least one cantilevered latch arm projects from the body member for latching the male connector to the complementary mating connecting device. A resilient web is joined between the latch arm and the body member. The resilient web performs the functions of providing an anti-overstress means and a spring means for the cantilevered latch arm as well as acting as an anti-snagging feature of the connector.
As disclosed herein, the body member, including the latch arm, is unitarily molded of relatively rigid plastic material, and the resilient web is fabricated of an elastomeric material such as silicone rubber. The resilient web may be molded substantially about the cantilevered latch arm near a distal end thereof. The body member may be elongated, and including a pair of the latch arms and a corresponding pair of the resilient webs at opposite ends of the body member.
Other objects, features and advantages of the invention will be apparent from the following detailed description taken in connection with the accompanying drawings.
BREIF DESCRIPTION OF THE DRAWINGS
The features of this invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with its objects and the advantages thereof, may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements in the figures and in which:
FIG. 1 is a perspective view of a male connector for a flat flexible circuit and incorporating the concepts of the invention;
FIG. 2 is a perspective view of the rear of the connector;
FIG. 3 is a top plan view of the connector;
FIG. 4 is a vertical section taken generally along line 4—4 of FIG. 3; and
FIG. 5 is a vertical section taken generally along line 5—5 of FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings in greater detail, a male connector, generally designated 10, is shown for electrically interconnecting the conductors 12 of a flat flexible cable 14 to the conductors of a complementary mating connecting device (not shown). For instance, male connector 10 can be mated with a complementary female connector by inserting a leading edge 16 of the male connector into an appropriate receptacle of the female connector. In some applications, the male connector could be connected to another complementary male connector. In these various applications, flat flexible cable 14 is wrapped around leading edge 16 of the connector, and locating holes 18 in the cable are positioned over locating posts 20 on opposite sides of the male connector.
More particularly, male connector 10 includes a male body member 22 about which flat flexible cable 14 is wrapped. The male body member is generally flat and elongated and includes a pair of cantilevered latch arms 24 at opposite ends thereof. The body member, including the latch arms, is unitarily molded of relatively rigid dielectric material such as plastic or the like. Cantilevered latch arms 24 are joined to the body member at proximal ends 24 a of the latch arms near opposite ends of leading edge 16 of the connector. Therefore, free ends 24 b (FIG. 2) of the latch arms can flex in the direction of double-headed arrows “A” (FIGS. 1 and 3). Finally, a pair of latch hooks 24 c project outwardly of latch arms 24 for engagement with appropriate latch means on the complementary mating connecting device.
The invention contemplates the provision of a resilient web 26 which is joined between each latch arm 24 and the adjacent end of body member 22. For maximum benefit, the webs are joined between distal ends 24 b of the latch arms and opposite ends of the elongated body member. The resilient webs perform a dual function of providing an anti-overstress means as well as a spring means for the cantilevered latch arms. In other words, the latch arms cannot be pulled excessively away from opposite ends of the body member because of the constraints of the resilient webs. Such pulling action otherwise could overstress and actually break the latch arms. In addition, the resilient webs provide auxiliary spring means for the latch arms. With the latch arms being molded of relatively rigid plastic material, over time and under continuous use the plastic material of the latch arms lose their flexibility, whereas resilient webs 26 continue to provide a necessary spring means. Finally, since the webs are contiguous between each latch arm and the adjacent end of the body member, nothing can easily enter the area between those two features and therefore the webs also provide an “anti-snagging” feature that minimizes interference during assembly of the connector.
It is contemplated that resilient webs 26 comprise molded-in-place components which can be either insert molded on male body member 22, or the webs and the body member can be simultaneously molded as a “two-shot” injection process. It can be seen in FIG. 4 that the resilient webs have portions 26 a molded about distal ends 24 b of the latch arms. The webs also have portions 26 b molded about integral rib portions 22 a of body member 22. The webs, including portions 26 a and 26 b thereof, can be molded of elastomeric material, such as silicone rubber.
Finally, a yieldable backing structure 30, such as of silicone rubber or other elastomeric material, also can be molded-in-place simultaneously with the molding of resilient webs 26. The yieldable backing structure can be molded about a rib 22 b of body member 22 as seen in FIG. 5. The yieldable backing structure, thereby, lies beneath flexible circuit 14 for resiliently biasing conductors 12 of the circuit against the conductors of the mating connecting device when male connector 10 is mated with the device.
It will be understood that the invention may be embodied in other specific forms without departing from the spirit or central characteristics thereof. The present examples and embodiments, therefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.

Claims (20)

What is claimed is:
1. A male connector for electrically interconnecting the conductors of a flat flexible circuit to the conductors of a complementary mating connecting device, comprising:
a generally elongated male body member having a leading edge about which the flexible circuit is adapted to be wrapped;
at least one locating post integrally formed on the male body member adapted to receive a corresponding hole in the flexible circuit;
a cantilevered latch arm projecting from each side of the body member for latching the male connector to the complementary mating connecting device; and
a resilient web joined between each latch arm and the body member,
wherein the male connector is unitarily molded thereby constituting a one-piece connector.
2. The male connector of claim 1 wherein said resilient web comprises a molded-in-place component.
3. The male connector of claim 2 wherein said body member, including said latch arm, is unitarily molded of plastic material and the resilient web is of elastomeric material.
4. The male connector of claim 2 wherein said resilient web is molded substantially about the cantilevered latch arm near a distal end thereof.
5. The male connector of claim 1 wherein said body member, including said latch arm, is unitarily molded of relatively rigid plastic material.
6. The male connector of claim 1 wherein said resilient web is an elastomeric rubber structure.
7. The male connector of claim 1 wherein said body member is elongated, and including a pair of said cantilevered latch arms and a corresponding pair of said resilient webs at opposite ends of the body member.
8. A connector for electrically interconnecting the conductors of a flat flexible circuit to the conductors of a complementary mating connecting device, comprising:
a generally elongated body member having a leading edge about which the flexible circuit is adapted to be wrapped;
at least one locating post integrally formed on the body member adapted to receive a corresponding hole in the flexible circuit;
a flexible latch projecting from each side of the body member for latching the connector to the complementary mating connecting device; and
a resilient web joined between each flexible latch and the body member,
wherein the connector is unitarily molded thereby constituting a one-piece connector.
9. The connector of claim 8 wherein said resilient web comprises a molded-in-place component.
10. The connector of claim 9 wherein said body member, including said flexible latch, is unitarily molded of plastic material and the resilient web is of elastomeric material.
11. The connector of claim 9 wherein said flexible latch comprises an arm having a distal end, and the resilient web is molded substantially about the distal end.
12. The connector of claim 8 wherein said body member, including said flexible latch, is unitarily molded of relatively rigid plastic material.
13. The connector of claim 8 wherein said resilient web is an elastomeric rubber structure.
14. The connector of claim 8 wherein said body member is elongated, and including a pair of said flexible latches and a corresponding pair of said resilient webs at opposite ends of the body member.
15. An electrical connector for mating with a complementary mating connecting device, comprising:
a generally elongated body member;
a locating post integrally formed on the body member adapted for positioning a circuit element wrapped around an edge of the body member;
a flexible latch projecting from each side of the body member for latching the connector to the complementary mating connector device; and
a resilient member joined between the respective flexible latch and the body member,
wherein the electrical connector is unitarily molded thereby constituting a one-piece connector.
16. The electrical connector of claim 15 wherein said resilient member comprises a molded-in-place component.
17. The electrical connector of claim 16 wherein said body member, including said flexible latch, is unitarily molded of plastic material and the resilient member is of elastomeric material.
18. The electrical connector of claim 15 wherein said body member, including said flexible latch, is unitarily molded of relatively rigid plastic material.
19. The electrical connector of claim 15 wherein said resilient member is an elastomeric rubber structure.
20. The electrical connector of claim 15 wherein said body member is elongated, and including a pair of said flexible latches and a corresponding pair of said resilient members at opposite ends of the body member.
US09/049,831 1998-03-27 1998-03-27 Male electrical connector for flat flexible circuit Expired - Lifetime US6244890B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US09/049,831 US6244890B1 (en) 1998-03-27 1998-03-27 Male electrical connector for flat flexible circuit
DE69923020T DE69923020T2 (en) 1998-03-27 1999-03-19 Electrical connector
ES99105626T ES2232045T3 (en) 1998-03-27 1999-03-19 ELECTRICAL CONNECTOR
EP99105626A EP0945927B1 (en) 1998-03-27 1999-03-19 Electrical connector
JP11079646A JP3122969B2 (en) 1998-03-27 1999-03-24 Electrical connector
BR9901126-3A BR9901126A (en) 1998-03-27 1999-03-25 Connector
KR1019990010633A KR100310427B1 (en) 1998-03-27 1999-03-26 Electrical connector
CNB991044304A CN1201438C (en) 1998-03-27 1999-03-26 Electrical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/049,831 US6244890B1 (en) 1998-03-27 1998-03-27 Male electrical connector for flat flexible circuit

Publications (1)

Publication Number Publication Date
US6244890B1 true US6244890B1 (en) 2001-06-12

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US09/049,831 Expired - Lifetime US6244890B1 (en) 1998-03-27 1998-03-27 Male electrical connector for flat flexible circuit

Country Status (8)

Country Link
US (1) US6244890B1 (en)
EP (1) EP0945927B1 (en)
JP (1) JP3122969B2 (en)
KR (1) KR100310427B1 (en)
CN (1) CN1201438C (en)
BR (1) BR9901126A (en)
DE (1) DE69923020T2 (en)
ES (1) ES2232045T3 (en)

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US8926355B2 (en) 2012-06-29 2015-01-06 Lear Corporation Connector position assurance device for a connector assembly
US20150214644A1 (en) * 2014-01-28 2015-07-30 Wei Sun Chang Flexible flat cable connector and flexible flat cable thereof
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US8771184B2 (en) 1993-09-04 2014-07-08 Body Science Llc Wireless medical diagnosis and monitoring equipment
US6626698B2 (en) * 2001-07-09 2003-09-30 Yazaki Corporation Holder for a flat circuit member
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JPH11329624A (en) 1999-11-30
CN1201438C (en) 2005-05-11
ES2232045T3 (en) 2005-05-16
CN1230805A (en) 1999-10-06
KR19990078321A (en) 1999-10-25
DE69923020D1 (en) 2005-02-10
EP0945927A3 (en) 2000-12-20
BR9901126A (en) 1999-12-21
EP0945927A2 (en) 1999-09-29
JP3122969B2 (en) 2001-01-09
KR100310427B1 (en) 2001-10-17
DE69923020T2 (en) 2005-12-15
EP0945927B1 (en) 2005-01-05

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